Your child may indeed not need her afternoon naps anymore. Track her physical activity level, how well she sleeps during the night and for how long. Look for any mood changes especially during certain times of the day. All these variables will suggest whether this is a natural "self-weaning" from her nap or a momentary blip on the screen.
Stopped Napping...for Good?
Toddler and Teenager Expert Advice from Carleton Kendrick, Ed.M., LCSW